137th Gebirg wrote:
Question is, are they going to go it on their own or are they going to write it with the support and blessing of GRRM?
Probably a combination. They know in broad strokes where GRRM intends to take all of the various storylines. They'll likely deviate from the books to an increasing degree, while hitting many of the key plot points GRRM has laid out. Quite how much they veer away from the books will be very interesting to see.
Here's a new trailer for season four that's just been released: